TLo Concbologists. 



H. B. PRESTON, F.Z.S., 



Begs to inform Collectors and others that he will be pleased to forward on application 

 price list of any GENERA included in his 



LARGE AND VARIED STOCK OF SHELLS. 



SELECTIONS SENT ON APPROVAL. MUSEUMS SUPPLIED, 



Addpess-H. B. PRESTON, FZ.S., 

 3, Sydney Teprace, Fulham Road, London, S.W. 



7 wo minutts walk fi om South Kensington Station, 



JAPANESE SHELLS. 



Faultless specimens of the beaultful and interesting shells of Japan and the 

 Loo Choo Islands, both land and marine are offered at low prices, sent by mail. 

 The land shells include some of the finest Helices of the genera Etilota, Gane- 

 sella, etc. The Clausilias, unlike those of Europe, are the largest of any region. 

 Also many fine operculates and Marine Shells. 



Y. HIRASE, Kyoto, Japan. 



Living Specimens for the Microscope. 



Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphrerium, 

 Vorticella, Stentor, Hydra, Floscularia, Ste[)hanoceros, Melicerta, and many other 

 Specimens of Pond Life Price l/-per Tube, Post Free. Helix pomatia, Astacus, 

 Amphioxus, Rana, Anodon, etc., for Dissection purposes. 



THOMAS BOLTON, 25, BALSALL HEATH ROAD, Birmingham. 



JAMES SWIFT & SON, 



MANUFACTURING OPTICIANS, 



Sevin Gold Medals awarded fjr Of>liial Excellence. 



Student's Micri scope fitted wiih j in and \ in. 

 Objectives, sliding course adjustment, micrometer 

 screw fine adjustment for slow focussing, eye-piece 

 and iris diaphragm, in Cabinet - ^"5 5 



Double nose-piece and extra eye-picce 10 U 



Fig. 2 .Student's Stand, as per illustration 

 with f in. and \ in. Objectives, eye-piece and iris 

 diaphragm, in Cabinet - - - ;(,7 15 



Double nose-piece and extra eyep'ece lo 



Prof. Delepine's microscope, as ufed in the Birn.ingham University, wiih c 'arse 

 and fine adjustmen.s, extra large stage covered with vulcanite, nin. ,';in. an(li'._,in 

 Objectives, Abbe condenser N.A. 1"2 fitted with iris diapl.rrm icnd special 

 focussing rdjdstment, triple nosepiece and eyepiece, in Cabinet - /,1.5 tl. 



This stand is used in all the principal laboratories througluut the Kingil nn. 



UNIVERSITY OPTICAL WORKS, 



81, TOTTENHAM COURT RD., 



LONDON, W. 



phase mention this Journal in replying to Advi' tiscinents 



